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Install goyacc with Homebrew
Parser Generator for Go. Version 1.0.3 via Homebrew; verified 2026-07-25.
install
Additional install commands
overview
Package summary
Parser Generator for Go
Project links
Commands and aliases
- goyacc
history
Project history and usage
modernc.org/goyacc is Jan Mercl's Go parser-generator command derived from the Go toolchain's goyacc lineage. It reads yacc grammars and emits Go parsers, while adding compatibility and diagnostics features beyond the older `go tool yacc` style.
Project history
The modernc.org implementation begins in public history in November 2014. Its source comments state that it uses portions of code previously published in the Go tool `yacc` program, while the Go tools documentation describes that upstream goyacc as largely transliterated from Inferno's Limbo version, itself largely transliterated from the Plan 9 C version.
The project moved its import path and repository root to modernc.org in 2018, and pkg.go.dev records `gitlab.com/cznic/goyacc` as the repository for the modernc.org module.
Adoption history
goyacc is part of a long Unix parser-generator tradition adapted for Go. The Go project used goyacc as an example in the Go 1.4 `go generate` announcement, showing how generated parsers fit into Go package maintenance even though generation is run explicitly by package authors.
How it is used
The command accepts a yacc input file or standard input and writes a Go parser, defaulting to `y.go`, with options for the symbol prefix, parser report output, follow sets, conflict explanations, and generated error examples. Generated parsers use a Go lexer interface instead of C yacc globals.
Why package nerds care
For package maintainers, goyacc is a compact bridge between old compiler-construction workflows and Go modules: grammars can live beside Go source, generation can be driven by `go generate`, and the installed binary is small enough to package directly in Homebrew.
Timeline
- 2014: modernc.org/goyacc public history begins and records the initial release work.
- 2014: Go 1.4 introduces `go generate`, with goyacc used as a code-generation example.
- 2015: The modernc.org command adds generated error-message support via examples.
- 2017: The command adds follow-set reporting.
- 2018: The project moves its repository root to modernc.org and tags v1.0.0.
- 2023: v1.0.3 tag updates dependencies.
Related projects
- golang.org/x/tools/cmd/goyacc is the Go tools implementation in the same yacc-for-Go lineage.
- Plan 9 yacc and Inferno yacc are earlier implementations named in the Go tools documentation.
- modernc.org/y and modernc.org/parser/yacc are related modernc parser packages used by the command.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
goyacc | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version1.0.3
manager updated2026-07-25
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:goyacc |
|---|---|
| Version | 1.0.3 |
| Package manager | Homebrew |
| Homepage | https://pkg.go.dev/modernc.org/goyacc |
| Last updated | 2026-07-25T20:55:27-04:00 |
| Pulse | updated |
| Bottle | not recorded |
| Service | none declared |
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- pkg.so package database
- pkgdb category and tag curation